I don't think the new penalties will make any difference. I make a point of counting handheld mobiles on my 4-mile daily bike ride. This morning - 4. One was a white builder's van, turning right on to a main road, sun in eyes, phone in right hand. I pointed at him and shouted out "Mobile phone !!" as I always do, and as so frequently, was met with "F--- off C---"
It would be lovely to take a photo and shop the dangerous inconsiderate swine, but that is never going to work. For starters, you'd never be able to prove date/time.